Not sure going to monoblocks is going to do too much to help add richness. There’s a nice McCormack DNA-2 on US Audiomart for $1750 that, if you want, you could send to Steve to do any level of his upgrades to make a very special amp. I find McCormacks to have some richness and oomph in the lower mids that may fill in some of the richness you’re looking for. Obviously dynamics are not an issue. Best of luck.
